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We hypothesised that the isotopic signature of Pb in the digestive gland of the common octopus reflects the organisms' sources of Pb, and investigated whether isotopic Pb ratios are useful in characterising octopus populations. A total of 47 Octopus vulgaris individuals were captured betweendoi:10.3354/ab00157 fatcat:573tdba77ff4nb2bgvsbgde5yq